... peepholeItem no.: GJJA8 product name: anti-theft steel door,machine heat transfer steel door,security door place of origin: China loading port: Ningbo / ... )hinge:pure stainless steel cooper-plating large hinges (4)door leaf fill with rock woll,heat preservation,sound insulating, ... available for all wall thickness,with stainless steel door sill (7)security muti-points locking system,have 9-15 lock ...